Slide-valve.



G. E. McELROY.

- SLIDE VALVE.

APPLICATION FILED 050.13, 1915.

1 ,206, 1 2 1 v Patented Nov. 28, 1916.

nmm'mm 52 aww Inventor:

by W I UNITED STATES PATENT OFFIOE.

GEORGE E. MGELROY, OF NEIVARK, NEW JERSEY, ASSIGNOR T MCELBOYV ENGINECOMPANY, OF NEIVARK, NEW JERSEY, A CORPORATION OF NEW JERSEY.

SLIDE-VALVE.

Specification of Letters Patent. Patented NO 28, 1916.

Application filed December 13, 1915. Serial No. 66,533.

To all whom it may concern:

Be it known that I, GEORGE E. liIoELRoY, a citizen of the United States,residing at Newark, in the county of Essex and State of New Jersey, haveinvented certain new and useful Improvements in Slide-Valves,

of which the following is a specification.

My invention relates to improvements in internal combustion engines andparticularly to the type wherein inlet and exhaust ports in the cylinderwall are opened and closed by a slide valve.

The objects of my invention are the production of a simple and efiectivemeans for holding the valve in a gas tight seat over the ports at alltimes without undue friction and regardless of heat conditions and toautomatically take up any wear between the valve and seat.

In the drawing Figure 1 is a top view of my valve mechanism and Fig. 2 aside view, partly in section.

The cylinder 1 is provided with the customary water jacket 2 formedbetween the cylinder wall 1 and the outer wall 3. The valve pocket 41 inthe upper end of one side of the cylinder is provided with an inlet port5 and an exhaust port 6.

The slide valve 7 fits up against the seat 1 and has the hole 10 drilledthrough it with the enlargements 11 and 12 at either end. The valve stem13 is threaded at the upper end. A nut 14 at the lower end supports asleeve 15 which is less in diameter than the opening 10 and a triflelonger so that when the nut 16 is screwed down onto the sleeve 15 thevalve 7 will not bind on the stem but on the contrary will have alimited lateral movement. The valve stem 13 extends downwardly throughthe casting and contacts with a cam 17 which reciprocates the valve.Opposite the valve seat the casting is made solid at 18 with the opening19 therethrough threadedat the outer end. A recess 20 in the valvereceives one end of the pushrod 21, the other end of which engages therecessed end of a plug 22 in the hole 19. A spring 23 bears against theplug 22 and is in turn compressed by the screw 24. The spring 23actingthrough the plug 22 and push rod 21 presses the valve 7 into a gastight seat with a firm but light pressure to avoid underfriction andwear and, by expansion and contraction, maintains this pressure duringreciprocation of the valve in spite of the angular changes the rod 21undergoes. The valve stem 13 being fixed in its position by its bearingin the casting but having a loose lateral connection with the valve inno wise restricts or cramps the seating thrust of the spring andautomatically enables the wear between the face of the valve and itsseat to be taken up by the thrust of the spring. By moving the nuts 1%and 16 and the sleeve 15 up or down the valve 7 may be accuratelyadjusted with respect to the ports 5 and 6. The valve 7 and push rod 21are within the com bustion space and are subject to the heat ofexplosion but the spring 23 is water jacketed so that it is not undulyheated and its temper drawn. It is also apparent that the spring willautomatically take up the expansion caused by heat in the valve, pushrod and plug and will securely hold the push rod in position in thesockets in the valve and plug.

The foregoing describes the mechanical form in which my invention hasbeen em- 7 bodied but the details may be varied to meet different enginedesigns without departing from the scope of my invention.

I claim 1. In an internal combustion engine, a valve pocket in thecombustion space, a slide valve therein, a spring without the combustionspace and means connecting said spring and valve for maintaining thevalve in a gas tight seat in the pocket.

2. In an internal combustion engine, a valve pocket in the combustionspace, a slide valve therein, a push rod extending across the combustionspace and bearing on the valve, a spring without the combustion chamberoperating on the push rod to maintain a gas tight seat between the valveand its seat in the pocket.

8. In an internal combustion engine, a valve pocket, a slide valvetherein recessed in its outer face, a push rod one end of which engagessaid recess, an opening in the cylinder casting opposite the valve, 2.recessed plug therein engaging the other end of the push rod, a springwithout the combustion space bearing onthe plug and an adjusting screwbearing on'the spring.

4. In an internal combustion engine, a valve pocket, a slide valvetherein with an opening therethrough, a valve stem extending through theopening of less diameter than the opening means on the stem holding thevalve therebetween, and a pushrod one length than the opening, upper andlower 5 nuts engaging the sleeve and valve, and a pushrod one end ofwhich bearson the valve and extends across the combustion space, aspring Without the combustion space maintalning pressure on the otherend of the 20 rod for maintaining the valve in a gas tight seat in thepocket.

In testimony whereof I have affixed my signature in presence of twoWitnesses.

GEORGE E. MOELROY. lVitnesses 7 ROBERT B. KILLeoRE, M:AY M. L rr.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. O. i

